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l Patented Mar. 17, 1885.

s. J. WAKELBY.

DIE 0R NIPPLE HOLDER.

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UNITED STATES PATENT OEETCE.

SETH J. VAKELEY, OF NEV YORK, N. Y.

DIE OR NIPPLE HOLDER.

SPECIFICATION forming part of Letters Patent No. 314.087, dated March17, 1885.

Application filed July 3 1, 1884. (No model.)

To @ZZ whom it may concern.:

Be it known that I, SETE J. WAKELEY, a citizen of the United States,residing in the city and county of New York, in the State of New York,have invented a new and useful Improvement in Die or Nipple Holders forMachines for Threading Pipe and Nipples, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to the die or nipple holders which are employedin the sliding carriage which moves to and fro toward and from therotary main spindle of a pipe-threading machine, and which are adaptedto receive threading-dies for cutting threads on pipes held in vise-jawsfitted to the said spindle, or to receive vise-jaws for holding nipplesor pipe to be threaded by dies in the rot-ary main spindle.

The improvement consists in anovel construction of the holder,hereinafter described, whereby the jaws or dies are enabled to run veryclose up to the rotary main spindle, and whereby, when vise-jaws areemployed in the holder, they may be made to securely hold a short pieceof pipe by a very short hold, and whereby, also, very convenientprovision is ai'- forded for rapidly changing the dies for others ofdifferent size through the whole range of variations of sizes ever usedin such machines, and for as rapidly changing dies for vise-jaws, andvice versa.

Figure 1 in the drawings is a face view of a die or nipple holderconstructed according to my invention, and containing a pair ofthreading-dies. Fig. 2 is a longitudinal central section of the same.Fig. 3 is a transverse section of the same. Fig. 4 is a face view of theslides containing a pair of vise-jaws.

Similar letters of reference indicate corresponding parts in the severalfigures.

A is the main plate of the holder, which is of ordinary construction,and irrnly secured in the usual way to the sliding carria-ge of thepipe-threading machine, with its opening a concentric with the axis ofthe rotary lmain spindle of the machine. This plate is constructed withparallel grooved guides a a,between and within which the open slide B isfitted to slide freely, and is also provided with a projecting head, b,which is bored for the reception of the plainly-turned neck of thehollow screw C,

which is free to turn therein, but prevented from moving lengthwisetherein by nuts or collars c c', which are providedon the said screw andso secured thereon as to be prevented from turning. The exterior threadof this screw works in a female screw thread or nut provided at u in oneend of the slide B.

In the opposite end of the slide B to that in which the screw C worksthere is a mortise or mortise-like opening, d d, for the entrance intosaid slide of the screw-threading dies D D or the vise-jaws E E', andthe sides of the said slide are made with internal grooves, e e, whichconform to the ends of the' said mortise d d, and to which the dies D Dare tted. One

die, D', or one .vise-jaw, E', is secured by pins.

f f to the grooved slide F, which forms the head of the male screw F,which is fitted to a female screw-thread in the hollow screw C, the saidpins ff passing through holes in the said slide F and the said die orjaw, sothat the said die or jaw is compelled to move with the screw. Theslide F is tted and guided between the straight parallel sides oftheppening in the slide B. The other die, D, or jaw E, is confinedwithin the slide by a block, G, which fits the mortise d in the end ofthe slide B, and is secured therein by pins h h,inserted through thesaid die or jaw and slide.

The grooves e e inthe slide B are represented as tted withpacking-pieces z' i, which are set up by setscrews jj, for the purposeof keeping the dies sufficiently tight in their places for accuracy ofwork, while leaving them free to move as required.

' The dies and holding-jaws are -so formed and tted to the slides thatthe center of their opening is opposite the center of the hole ain themain plate and in line 'with the axis of the rotating main spindle ofthe machine, and this position is always maintained in the opening andclosing adjustment of the dies or jaws by the action of the two screws Cand F, which are of corresponding pitch, but of opposite inclinations,one being right -handed and the other left-handed. The adjustment isefected by a'wrench or handle applied to the head of the screw C, whichcauses theslide B to be moved in either direction, and the slide F to bemoved in the other direction, according to the direction in which thescrew O is turned.

lo change the dies for others of diderent size, or to change diesforjaws, or vice versa, it is only necessary to take out the pins h'h,and take ont the block G l'roni'the niortise d d, when the dies or jawsmay both bewithdrawn through the said inortise. The substitute dies orjaws are inserted through the inortise, and secured by replacing theblock G and the pins h h.

This die and vise holder provides for the quick opening and closingadjustment of the dies and vise-jaws, and also for easily and quicklychanging the dies and jaws, the Ymethod of providing for theremoval andinsertion 4of the dies and .jaws through the inortise in the end of theslide B obviating the necessity of removable face-plates, which add tothe thickness of the slide, enables the dies orjaws to come closer up tothe rotary lnain spindle, which is of especial advantage in threadingnipples or very short pieces of pipe.

In the use of this die and holder it is not necessary to reverse themachine after cutting the thread.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, in a die or Workholder for the sliding carriage of apipe-threading machine, of the two slides tted one within the other, theouter one having an opening in one end for the introduction of the diesor jaws of both slides, and a block and means of securing the same insaid opening for retaining the dies, substantially as herein described.

2. The combination of the plate A of the carriage of a pipethreadingmachine, the slide B, fitted to said plate, the slide F', fitted to saidslide B, the screws C F, for moving the said slides in oppositedirections, and the dies or vise-jaws Within and between said slides,the said slide B having a niortisc, d d, in one end for the introductionof the dies or jaws, and a groove, e, conforming to said mortise, forguiding and retaining the dies or jaws, substantially as hereindescribed.

FREDK. aYNEs, EMIL SGHWARTZ.

